Timber-Aluminium Windows

HF 400 Timber-Aluminium Windows

Our Internorm HF 400 timber-aluminium windows are designed to seamlessly open up any property. With minimal sightlines, we can include large glass panes in these Internorm windows, which invites an abundance of natural light into the building. This light can make any indoor space appear larger and more comfortable. Our HF 400 timber-aluminium windows can also be built according to your specifications.

aluminium window profile Surrey

Thermal Insulation (in W/m2K):

Uw up to 0.70


Sound Reduction (in dB):

35 - 45



Secured by Design & PAS 24

More Info

Available nationwide, these triple glazed windows can be designed to your precise measurements and requirements. The external aluminium cladding on our HF 400 timber-aluminium windows can be designed to match the style of any property. With heat insulating glass as standard, our HF 400 timber-aluminium windows achieve a U-value of just 0.70 W/m2k. Contact us to find out more about our HF 400 timber-aluminium window prices.

Technical Specifications

Dimension (in mm) Opening Versions Gaskets
Frame construction depth 75
Quantity 3
View width frame/sash 99
Turn and turn/tilt
Colour Black
View width flying mullion (2 sashes) 106
View width transom/mullion (2 sashes) 156
Sliding window
Lockable doors
Sliding doors
Doors with threshold
Outward Opening Doors

Features & Benefits

Slimline Design

Our HF 400 timber-aluminium windows will maximise the amount of natural light in any home or new build property. Available nationwide, these windows have narrow frames which allows for large glass panes which creates the illusion of a bigger space.

Made To Your Specifications

We are able to make our HF 400 timber-aluminium windows in a variety of sizes to suit almost any property. The external aluminium cladding on our triple glazed windows is available in a range of colours to match the aesthetic of your project.

Weather Resistant

Our HF 400 timber-aluminium windows include external, weather resistant, aluminium cladding which is designed to prevent rain or wind ingress. With heat insulated glass as standard, these windows have a U-value of just 0.70W/m2k.

aluminium sliding doors supplier

HF 400 Timber-Aluminium Window Prices

You can fill out an online contact form to find out more information about our pricing. You can call 0800 612 6519 to speak to one of our friendly product specialists. They will be happy to help you with any questions or specific requirements that you may have. Come and visit one of our showrooms to really appreciate the level of detail which goes into the construction of our windows. Book an appointment today and use our Find A Showroom tool to discover the nearest one to you, whether that be in Gloucestershire or across England & Wales.

Extra Features


These Internorm are available with a range of upgrades and configurable options, including handle variation, glazing upgrades and much more.

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Window Hardware Installers Gloucestershire

Case Studies

Look at our case studies to find inspiration for how our windows can match the home. Flick through our before and after pictures to learn more about our installation process.

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Minimal Frame Aluminium Windows Gloucestershire


Our showrooms, located across England and Wales, are the perfect opportunity to get an in depth impression of our windows and ask our product specialists any questions which you may have in person.

View Showrooms
sliding door showroom

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